1 : <?php
2 : /*--------------------------------------------------------------------------+
3 : This file is part of eStudy.
4 : ressourcen/classes/filemanager/class.ressourcendb.inc.php
5 : - Modulgruppe: File Manager
6 : - Beschreibung: Klasse zur Datenbankanbindung
7 : - Version: 0.4, 08.01.08
8 : - Autor(en): Tobias Wild <tobias.wild@mni.fh-giessen.de>
9 : +---------------------------------------------------------------------------+
10 : This program is free software; you can redistribute it and/or
11 : modify it under the terms of the GNU General Public License
12 : as published by the Free Software Foundation; either version 2
13 : of the License, or any later version.
14 : +---------------------------------------------------------------------------+
15 : This program is distributed in the hope that it will be useful,
16 : but WITHOUT ANY WARRANTY; without even the implied warranty of
17 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 : GNU General Public License for more details.
19 : You should have received a copy of the GNU General Public License
20 : along with this program; if not, write to the Free Software
21 : Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 : +--------------------------------------------------------------------------*/
23 :
24 : if (!defined("PATH_TO_ROOT")) {
25 : define("PATH_TO_ROOT", "../../");
26 : }
27 :
28 : class RessourcenDB {
29 : private $fileManager = null;
30 :
31 : public function __construct($fileManager = null) {
32 0 : $this->fileManager = $fileManager;
33 0 : }
34 :
35 : public function setFileManager($filemanager) {
36 0 : $this->fileManager = $filemanager;
37 0 : }
38 :
39 : public static function getVisibilityConstraintSQL() {
40 0 : global $db, $settings;
41 0 : $time = Data::toMysql(time());
42 0 : $userid = Data::toMysql($_SESSION["userid"]);
43 0 : $sqlAdd = "";
44 0 : if ($_SESSION['usergroup'] == STUDENT
45 0 : || $_SESSION['usergroup'] == ALUMNUS
46 0 : || $_SESSION['usergroup'] == SCHUELER
47 0 : || $_SESSION['usergroup'] == GAST
48 0 : || $_SESSION["usergroup"] == SEKRETARIAT) {
49 : // Hier darf kein visible_type eingeschraenkt werden,
50 : // da sonst die Einzeluser-Berechtigung nicht mehr funktioniert !!!
51 0 : $sqlAdd = "AND ((filelist.userID='".$userid."' OR (start_time<'
52 0 : $time' AND end_time>'$time' AND visible_type=1))";
53 0 : if (isset($_SESSION["assistent"])) // TUTOR
54 0 : $sqlAdd = "AND ((visible_type<='2' OR filelist.userID='".$userid."')";
55 0 : $visibleFiles = $db->get_col("SELECT fileID FROM filevisible WHERE userID='".$userid."'");
56 0 : if ($db->num_rows) $sqlAdd.= " OR fileID IN (".implode(",", $visibleFiles) .")";
57 0 : $sqlAdd.= ")";
58 0 : }
59 0 : return $sqlAdd;
60 : }
61 :
62 : public function getSubFolder($pFolder) {
63 0 : global $db;
64 0 : $sqlAdd = self::getVisibilityConstraintSQL();
65 0 : $folderID = Data::toMysql($pFolder->getID());
66 :
67 0 : if ($folderID == 0) {
68 0 : $foldersDB = (array) $db->get_results(
69 : "SELECT courseID, create_time, description, student_write, userID, fileID,
70 0 : link, visible_type, name FROM filelist WHERE courseID='".Data::toMysql($_SESSION['course']).
71 0 : "' AND type='folder' $sqlAdd"
72 0 : );
73 0 : } else {
74 0 : $foldersDB = (array) $db->get_results(
75 : "SELECT courseID, create_time, description, student_write, userID, fileID,
76 0 : link, visible_type, name FROM filelist WHERE parent_object='".$folderID.
77 0 : "' AND courseID='".Data::toMysql($_SESSION['course']).
78 0 : "' AND type='folder' $sqlAdd ORDER BY link"
79 0 : );
80 : }
81 0 : $folders = array();
82 0 : foreach ($foldersDB as $folderDB) {
83 0 : $folder = $this->getFolderObject($folderDB);
84 0 : $folder->setParentFolder($pFolder);
85 0 : $folder->setFolderState(
86 0 : $db->get_var(
87 : "SELECT userID FROM filetreelayout WHERE userID='".
88 0 : Data::toMysql($_SESSION['userid'])."' AND folderID='".
89 0 : Data::toMysql($folderDB->fileID)."'"
90 0 : )
91 0 : );
92 0 : $folders[] = $folder;
93 0 : }
94 0 : return $folders;
95 : }
96 :
97 : public static function saveFolderState($folder) {
98 0 : global $db;
99 0 : $folderState = $folder->getFolderState();
100 0 : $userid = Data::toMysql($_SESSION['userid']);
101 0 : $folderID = Data::toMysql($folder->getID());
102 0 : if ($folderState) {
103 0 : $db->query("DELETE FROM filetreelayout WHERE userID='".$userid."' AND folderID='".$folderID."'");
104 0 : $folder->setFolderState(false);
105 0 : } else {
106 0 : $db->query("INSERT INTO filetreelayout (userID, folderID) VALUES ('".$userid."','".$folderID."')");
107 0 : $folder->setFolderState(true);
108 : }
109 0 : }
110 :
111 : private function getFileObject($dbObject) {
112 0 : $file = new File();
113 0 : $file->setFileID($dbObject->fileID);
114 0 : $file->setVisibleType($dbObject->visible_type);
115 0 : $file->setUserID($dbObject->userID);
116 0 : $file->setName($dbObject->name);
117 0 : $file->setOrigFileName($dbObject->orig_filename);
118 0 : $file->setType($dbObject->type);
119 0 : $file->setLink($dbObject->link);
120 0 : $file->setSize($dbObject->size);
121 0 : $file->setCounter($dbObject->counter);
122 0 : $file->setCreateTime($dbObject->create_time);
123 0 : $file->setDescription($dbObject->description);
124 0 : $file->setExtension($dbObject->extension);
125 0 : $file->setCourseID($dbObject->courseID);
126 0 : $file->setFileManager($this->fileManager);
127 0 : return $file;
128 : }
129 :
130 : private function getFolderObject($folderDB) {
131 0 : $folder = new Folder($folderDB->fileID);
132 0 : $folder->setCourseID($folderDB->courseID);
133 0 : $folder->setUserID($folderDB->userID);
134 0 : $folder->setLink($folderDB->link);
135 0 : $folder->setVisibleType($folderDB->visible_type);
136 0 : $folder->setName($folderDB->name);
137 0 : $folder->setStudentWrite($folderDB->student_write);
138 0 : $folder->setCreateTime($folderDB->create_time);
139 0 : $folder->setDescription($folderDB->description);
140 0 : $folder->setFileManager($this->fileManager);
141 0 : return $folder;
142 : }
143 :
144 : public function getFiles($folderID, $sortString = "create_time" , $desc = true) {
145 0 : global $db;
146 0 : $course = Data::toMysql($_SESSION["course"]);
147 0 : $direction = ($desc) ? "DESC" : "ASC";
148 0 : $sortString = Data::toMysql($sortString);
149 0 : $folderID = Data::toMysql($folderID);
150 0 : $sqlAdd = self::getVisibilityConstraintSQL();
151 :
152 0 : if ($folderID == 0) {
153 0 : $filesDB = (array) $db->get_results(
154 0 : "SELECT fileID, visible_type, userID, name, orig_filename, type, link, size,
155 : counter, create_time, description, extension, courseID FROM filelist LEFT OUTER
156 0 : JOIN user ON (filelist.userID=user.ID) WHERE (courseID=$course OR courseID=0)
157 0 : AND type!='folder' $sqlAdd "
158 0 : );
159 0 : } else if ($sortString == "userID") {
160 : //ASC sortierung anch NAME damit als 2. Kriteium immer name
161 0 : $filesDB = (array) $db->get_results(
162 : "SELECT fileID, visible_type, userID, name, orig_filename, type, link, size,
163 : counter, create_time, description, extension, courseID FROM filelist LEFT OUTER
164 : JOIN user ON (filelist.userID=user.ID) WHERE parent_object='".
165 0 : $folderID."' AND (courseID=$course OR courseID=0) AND type!='folder' $sqlAdd ".
166 0 : " ORDER BY user.Nachname " . $direction . ", name ASC"
167 0 : );
168 0 : } else {
169 : //ASC sortierung anch NAME damit als 2. Kriteium immer name
170 0 : $filesDB = (array) $db->get_results(
171 : "SELECT fileID, visible_type, userID, name, orig_filename, type, link, size,
172 : counter, create_time, description, extension, courseID FROM filelist WHERE
173 0 : parent_object='".$folderID."' AND (courseID='$course' OR courseID=0) AND type!='folder' ".
174 0 : $sqlAdd." ORDER BY ".$sortString. " ". $direction . ", name ASC"
175 0 : );
176 : }
177 0 : $files = array();
178 0 : foreach ($filesDB as $fileDB) {
179 0 : $files[] = self::getFileObject($fileDB);
180 0 : }
181 0 : return $files;
182 : }
183 :
184 : public function getNewestFiles($limit = 20) {
185 0 : global $db;
186 0 : $time = time();
187 0 : $course = Data::toMysql($_SESSION["course"]);
188 0 : $limit = Data::toMysql($limit);
189 0 : $filesDB = (array) $db->get_results(
190 0 : "SELECT fileID, visible_type, userID, name, orig_filename, type, link, size, counter,
191 0 : create_time, description, extension, courseID FROM filelist WHERE courseID='$course
192 0 : ' AND visible_type=1 AND type!='folder' AND start_time<'$time' AND end_time>'$time
193 0 : ' ORDER BY create_time DESC LIMIT $limit"
194 0 : );
195 0 : $files = array();
196 0 : foreach ($filesDB as $fileDB) {
197 0 : $files[] = self::getFileObject($fileDB);
198 0 : }
199 0 : return $files;
200 : }
201 :
202 : public function getMostRatedFiles($limit = 20) {
203 0 : global $db;
204 0 : $time = time();
205 0 : $course = Data::toMysql($_SESSION["course"]);
206 0 : $limit = Data::toMysql($limit);
207 0 : $filesDB = (array) $db->get_results(
208 0 : "SELECT fileID, visible_type, userID, name, orig_filename, type, link, size, counter,
209 0 : create_time, description, extension, courseID FROM filelist WHERE courseID='$course
210 0 : ' AND visible_type=1 AND type!='folder' AND start_time<'$time' AND end_time>'$time
211 0 : ' ORDER BY counter DESC LIMIT $limit"
212 0 : );
213 0 : $files = array();
214 0 : foreach ($filesDB as $fileDB) {
215 0 : $files[] = self::getFileObject($fileDB);
216 0 : }
217 0 : return $files;
218 : }
219 :
220 : public function getFileByID($fileID) {
221 0 : global $db;
222 0 : $fileID = Data::toMysql($fileID);
223 0 : $fileDB = $db->get_row(
224 0 : "SELECT fileID, visible_type, userID, name, orig_filename, type, link, size, counter,
225 0 : create_time, description, extension, courseID FROM filelist WHERE fileID = '$fileID
226 0 : ' AND type='file'"
227 0 : );
228 0 : if ($fileDB) {
229 0 : return $this->getFileObject($fileDB);
230 : }
231 0 : return false;
232 : }
233 :
234 :
235 : public function getFolderByID($folderID) {
236 0 : global $db;
237 0 : $folderID = Data::toMysql($folderID);
238 0 : $folderDB = $db->get_row(
239 : "SELECT name, fileID, courseID, link, userID, student_write, create_time, description,
240 0 : visible_type FROM filelist WHERE type='folder' AND fileID='".$folderID."'"
241 0 : );
242 0 : if ($folderDB) {
243 0 : return $this->getFolderObject($folderDB);
244 : }
245 0 : return false;
246 : }
247 :
248 : public function getUserCourses($userID) {
249 0 : global $settings, $db;
250 0 : $userID = Data::toMysql($userID);
251 0 : $courseID = Data::toMysql($_SESSION['course']);
252 0 : if ($_SESSION['usergroup'] == ADMIN
253 0 : || $_SESSION['usergroup'] == SEKRETARIAT) {
254 : $sql = "SELECT c.ID, c.ShortName AS SN, u.ShortName FROM courses AS c
255 : RIGHT JOIN user_course AS uc ON c.ID = uc.courseID LEFT JOIN user AS u
256 : ON uc.userID = u.ID WHERE ((u.Usergroup = 3 AND uc.differentUsergroup = 0)
257 0 : OR uc.differentUsergroup = 3) AND c.closed = 0 " . "AND c.ID <> ". $courseID .
258 0 : " ORDER BY c.ShortName, c.ID";
259 0 : } else {
260 : $sql = "SELECT c.ID, c.ShortName AS SN, u.ShortName FROM (user_course AS uc1,
261 : user AS u) RIGHT JOIN user_course AS uc2 ON uc1.courseID = uc2.courseID RIGHT
262 : JOIN courses AS c ON uc1.courseID = c.ID WHERE ((u.Usergroup = 3 AND
263 : uc2.differentUsergroup = 0) OR uc2.differentUsergroup = 3) AND uc1.userID = ".
264 0 : $userID." AND u.ID = uc2.userID AND c.closed = 0 " . "AND c.ID <> ". $courseID .
265 0 : " ORDER BY c.ShortName, c.ID";
266 : }
267 0 : $courses = (array) $db->get_results($sql);
268 :
269 0 : return $courses;
270 : }
271 :
272 : public function countSubElements($folderID, $subFolders = true) {
273 0 : global $db;
274 0 : $count = 0;
275 0 : $folderID = Data::toMysql($folderID);
276 0 : $sqlAdd = self::getVisibilityConstraintSQL();
277 0 : if ($subFolders) {
278 0 : $folders = $db->get_col(
279 : "SELECT fileID FROM filelist WHERE type='folder' AND parent_object='".
280 0 : $folderID."' ".$sqlAdd
281 0 : );
282 0 : if ($folders) foreach($folders as $folder) {
283 0 : $count+= $this->countSubElements($folder);
284 0 : }
285 0 : }
286 : $count+=
287 0 : $db->get_var(
288 : "SELECT COUNT(*) FROM filelist WHERE
289 : type!='folder' AND parent_object='".
290 0 : $folderID."' ".
291 : $sqlAdd
292 0 : );
293 0 : return $count;
294 : }
295 :
296 : /**
297 : * Get short course name.
298 : *
299 : * @param Integer $courseID Course id
300 : * @return String Short course name
301 : */
302 : public function getCourseShortNameByID($courseID) {
303 0 : global $db;
304 0 : $courseID = Data::toMysql($courseID);
305 0 : return $db->get_var("SELECT `ShortName` FROM `courses` WHERE `ID` = $courseID");
306 : }
307 :
308 : /**
309 : * Log file download.
310 : * Write log entry to filelog table and increment download count in filelist table.
311 : *
312 : * @param Integer $resourceID Resource id
313 : */
314 : public function logResourceDownload($resourceID) {
315 0 : global $db;
316 0 : $time = Data::toMysql(time());
317 0 : $resourceID = Data::toMysql($resourceID);
318 0 : $db->query(
319 0 : "INSERT INTO filelog (userID, fileID, date) VALUES ('".$_SESSION['userid'].
320 0 : "','$resourceID','$time')"
321 0 : );
322 0 : $db->query("UPDATE filelist SET counter=counter+1 WHERE fileID='$resourceID'");
323 0 : }
324 : }
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